Improvement in lathe



iitntcll giant @sind Gti-jim.

AND WILLIAM W'ISDOM, OF SAME PLACE.v

Letters Patent No. 95,694, lated ,October 12, 1869.

rMPovEMENT 1N Lunari.

The Schedule referred to in these Letters Patent and making part of thesame.

To whom it may concern.-

Beit known that I, JAMES KIEVLAN, of Chicago, in the county of Cook, andState of Illinois, have invented a new and useful ImprovementiuWood-'lurnL ing Gang-Lathes; and I do declare that the following is atrue and accurate description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,and being a part of this specilication, in which- Figure l is aperspective view of my invention;

Figure 2 is a view of one of the head-blocks, lwith caps removed, andits chuck in section; I

Figure 3 shows the construction of the tail-blocks;

Figure 4 is an end view of one or" the conical chucks;

Figure 5 shows the construction of the guiding-pin on each tail-spindle;

Figure 6, sheet 2, is a side elevation of the cam-ring' for' guiding thetail-spindles in their lateral movement;

also', of the vibrating feed-spout, for delivering the bolts to thelathes, which are shown in red lines;

Figure 7 is a horizontal section of the cam-ring, on

. the line x x, iig. 6, with the guiding-pins shown in out- Figure 8 isa side elevation of the stationary rest;

Figure 9 is a rear elevation o f the same; andI Figure 10 is a side'elevation of one of the steadyrest tool-holders, pivoted to thestationary rest.

Like letters refer' to like parts in each iigure.

The nature'of this invention relates toan improvement in automaticlathes for turning wood, and consists in combining in one machineseveral lathes revolving on a concentric shaft, said lathesbeingautomatically furnished with the bolts to be turned; the turning of saidbolts being effected by bringing them, while revolving at a high speed,into contactwith a series-of cutters pivoted to a stationary rest; also,in

a new, novel, and ingenious arrangement of its parts, as hereinaftermore fully shown and set forth.

In the drawingsf A represents metallic ,frame-standards, bolted toaproper bed-plate, (not shown.)

Bis a driving-shaft, provided with the usual fastand-loose pulleys, andis journalled in brackets projecting from 4the rear upper sides of theframe.

From a pulley on the end of the driving-shaft, mtion is communicated, bya belt, to a pulley on the central shaft C.

l) and D are pairs offour-armed spiders, rotating loosely7 on the shaftC, and are provided at their outer ends with bearings E and E', in vtheformerof which Rigidly secured to the shaft C, between the 4spiders D,is a four-grooved drum H, from which a rapid Inotion is communicated, byproper belts, to thelheadspindles F, the groovcd pulley l of eachspindle being secured to it opposite its corresponding groove in thedrum, as fully shown in iig. 1 of sheet 1, and in outline in fig. 6 ofsheet 2 of the drawings.

J is a pulley, whose axis is concentric with that of the spider D, towhich it is secured.

This pulley, through the countershaft and pulleys K, receives motionfrom a pulley, L, ou the drivingshaft B, which. thus gives a slowforward motion to the spiders D, while the spindles they carry revolveat a high speed. 1

M are rods, rigidly secured to and projecting from the spiders D,through apertures in the arms of the spiders D', which are securedthereto at the proper points by set-screws or other suitable means, thedistance between the head and tail-blocks varying with the length of the'bolts to be turned.

Each head-spindle F is provided, at its spur-end, with a cup-shapedchuck, N, for centrally guidingthe material to be turned to the spurs. l

The chuclrhas a lateral movement on the headspindle, being guided insuch movement by a. pin, n., in the chuck, projecting into the recess fin the spindle, and pressed outward by a spiral spring, O, on thespindle, between a collar thereon and the base of the chuck.

Similar chucks l\l"an'd springs O' are arranged and loperate'on thetail-spindles, for a like purpose.

in said bed-plate.

The cam-ring is further guided, in its lateral movement, by a recess, Y,ou its under side, embracing a rib ou the bed-plate, (not shown.)'lhe'guide-pins revolving against the cam-ring 'keep the tail-spindlesfrom pressing voutward and dropping the bolt which is being turned.

Q1 and Q2, g. 7, are cam-grooves in the bottomand rear sides of thecam-ring. After the bolt in each lathe has been turned to the propershape, after passing the cutters, the guide-pin of tail-spindle entersthe cam-guide Q1, and as the spider continues its revolution, thetail-spindle is drawn laterally through its bearings E', away, from theturned baluster, chairround, or object which has been turned, which thendrops down out of' the chucks, the spider continuing its revolution,with the tail-spindle vdrawn back, until thechucks-are level with thebottom of the hopper-' spout .R containing the bolts4 to be turned, whenthe guide-pin, passing through the cam-groove Q, cornpels thetail-spindle to move inward and press the spurs of both spindles intothe ends of the lowerlnost bolt` in the spout, the bolt beingautomatically centred on'the spurs by the action of the conical chucks.The vibrating feed-spout is pivoted, at .its rear end, to the posts a",and rests, when inclined forward, upon posts r', as shown in fig. 6.

The hopper is provided with projecting arm s, with which the chuck N onthe head-block comes in contact, in its upward passage, and raises thefeed-spout until it has reached a point above the horizontal plane, whenthe arm s is released, and the spout drops down to its support lr',shaking the bolts contained therein down against a stop in the lowerfront end, ready to be taken by the succeeding lathe.

S is a vibrating frame, pivoted to the upper and rear part of the mainframe, and is adjustable'vertically, and secured in position by properset-screws b in the quadrant d of said frame.

In the front ends of this vibrating frame is journalled a shaft, T,provided with a pulley, t, to which.

motion is communicated through a belt from the pulley U on thedriving-shaft.

V are saws, of any required diameter, and in any number, secured betweencollars on the shaft T by a jam-nut, y, one end of the shaft heiligthreaded fory this purpose. The ofce of these saws is to roughly shapethe bolt, before it is submitted to the action of the cutters. WVheredeep grooves are to be turned in particular spots in the bolts, saws ofgreater diameter than the rest in the series may be used for thepurpose.

W is a stationary rest, bolted to the bed-plate, opposite the chucks.

Pvoted to a lug, 1, iig. 8, is a steady-rest toolhclder, X, iig. l0, inwhich is secured a cutter, h,

'which reduces one-third of 4the, bolt in the chucks to the desiredshape;

A light rubber or other spring, t', attached to ,the stationary rest andthe heel of the tool-holder, draws it upward, until the bolt, comingforward, engages' with the thumb j of the tool-holder, and, while beingtn'rned, bears against the base of the thumb and the steady-rest k,which prevents chattering in the bolt.

The tool-holder X is drawn down with the bolt until its cutter ceases tooperate thereon, when it isvreleased, and the boltengages with a secondtool-hclder, X', similarly arranged, and pivoted to a lug, 2, on thestationary rest, when another 'portion of the bolt is,

tion of the bolt, when passing in contact with the same,

which completes the operation of turning.

To accommodate the cutters to the varying diameters of the articles tobe turned, the tool-holders may be adjusted to or from the work, in theslots in the studs 1, 2,- and 3.

The operations of this mechanism are automatic throughout. Bolts ofuniform length being placed in the vvibrating feedspout, each lathe`takes a bolt, chucks it, passes it under the saws, where it is roughlyshaped, finished by the cutters, and finally discharged at the bottom,in the continuous rotation of the machine.

What I claim as my invention, and desire to secure by Letters Patent, is

l. The stationary rest W, provided with a series of slotted studs, 1, 2,and 3, for sustaining and operating the cnt-ters h, when constructed andoperating as described. y i

2. The tool-holder X, provided with cutter h, thumb j, and steady-restk, in connection with spring i, attached to stationary rest W, whenconstructed and operating as and for the purposes specified.

3. The arrangement of the several devices4 of the head-spindle l",consisting of the chuck N, the spring O, the pin m., andthe recess f,when constructed and operating as shown and described, and for thepurposes set forth.

4. The combination of the several devices of thei tail-spindle G,consisting of the chuck N', the spring f O', the keylway g, the pin e,and the. guidepinP,

when constructed and operating as and vfor the pur-f poses described.

JAMES KIEVLAN. Witnesses:

H. S. SPRAGU'E, JAS. I. DAY.

